Specify JSX Runtime?

Thanks for creating this! I had issues with vite and generating .d.ts files, but tsup has been working great!

The only thing I noticed with my React library are these errors:

ReferenceError: React is not defined

Adding import * as React from 'react'; at the top of each file fixes it.

But based on https://github.com/developit/microbundle/issues/763#issuecomment-877388109, I was wondering if it’d be possible to do something similar like:

tsup --jsx 'React.createElement' --jsxImportSource react --globals react/jsx-runtime=jsx

[egoist]

Now in v5.3.0 you can use the --inject flag or the inject option to achieve this:

tsup --inject ./react-import.js

// react-import.js
import React from 'react'

export { React }

or for preact:

import { h, Fragment } from 'preact'

export { h, Fragment }

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But ideally, in the future, we should read jsxImportSource from tsconfig.json and automatically do this for you.

[darklight9811]

@egoist the documentation is missing a lot of important information, things that I discovered reading the source code. It also doesn’t say anything about inject